CN113472141A - Sintering waste heat power generation exciter and method for preventing oil contamination infection - Google Patents
Sintering waste heat power generation exciter and method for preventing oil contamination infection Download PDFInfo
- Publication number
- CN113472141A CN113472141A CN202110867701.5A CN202110867701A CN113472141A CN 113472141 A CN113472141 A CN 113472141A CN 202110867701 A CN202110867701 A CN 202110867701A CN 113472141 A CN113472141 A CN 113472141A
- Authority
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- China
- Prior art keywords
- shell
- exciter
- air inlet
- waste heat
- cooling fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 15
- 239000002918 waste heat Substances 0.000 title claims abstract description 15
- 238000010248 power generation Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000011109 contamination Methods 0.000 title claims abstract description 10
- 208000015181 infectious disease Diseases 0.000 title claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 230000005284 excitation Effects 0.000 claims abstract description 15
- 238000012423 maintenance Methods 0.000 claims description 11
- 239000003595 mist Substances 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 8
- 206010061217 Infestation Diseases 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 238000010292 electrical insulation Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 23
- 239000012459 cleaning agent Substances 0.000 description 7
- 238000009826 distribution Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- B08B1/12—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/20—Structural association with auxiliary dynamo-electric machines, e.g. with electric starter motors or exciters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a sintering waste heat power generation exciter capable of preventing oil contamination infection and a method thereof, wherein the exciter comprises a bearing seat, a main shaft is arranged in the bearing seat, one end of the main shaft is connected with a generator set, the other end of the main shaft is connected with an excitation unit, the excitation unit is provided with a shell, the top of the shell is provided with an air inlet pipe, the side surface of the shell is provided with an air outlet, a cooling fan is arranged in the air inlet pipe, and when the cooling fan works, air is blown into the shell to enable the interior of the shell to be in a positive pressure environment; the invention fundamentally avoids the condition that oil stains infect the excitation unit and avoids the harm caused by the reduction of electrical insulation.
Description
Technical Field
The invention relates to the technical field of sintering waste heat power generation production, in particular to a sintering waste heat power generation exciter and a method for preventing oil contamination infection.
Background
The sintering waste heat power generation system is a secondary energy recovery system for collecting the waste heat of the sintering ore for power generation through a sintering circular cooler. The generator set mainly comprises a generator, an exciter, a bearing seat and other main components. In various protections of the generator, the rotor grounding protection is an indelible ring, when the rotor has a point grounding fault, although the direct damage to the generator itself can not be caused in a short time, when the deterioration is aggravated and the two points grounding occurs, the safety of the generator is seriously threatened, such as: the symmetry of an air gap magnetic field of the generator is damaged, and the unit vibrates violently; the thermal effect of the short circuit current burns the rotor; damage other exciter devices, etc. Therefore, the root cause of one-point grounding of the generator rotor is analyzed, the fault phenomenon is completely eradicated in the operation and maintenance process, and the method is an effective means for guaranteeing the safety of personnel and equipment and improving the recovery efficiency of secondary energy.
In the early 2020, the sintering waste heat power generation system of Eggrash Steel Limited company of BaoWu group occasionally sends out an alarm of 'one point grounding of a generator rotor', and the generator can automatically recover to be normal after a short time; when the machine is stopped for maintenance for the first time, a maintainer adopts an electrified cleaning agent to clean oil stains attached to the rotating rectifier of the exciter, the machine is started after the maintenance is finished, and the waste heat power generation system does not send an alarm of 'one-point grounding of a generator rotor'; after running for two days, reporting 'one point of the generator rotor is grounded' again; and (4) stopping the machine for the second time for maintenance, similarly cleaning by adopting an electrified cleaning agent, and always giving an alarm of 'grounding one point of a generator rotor' after starting the machine.
Through analysis, the reasons for the above problems are found as follows: referring to fig. 3, the generator excitation end bearing is a radial sliding bearing, and due to friction between a large shaft rotating at a high speed and an oil film, the oil film generates local high temperature, so that part of lubricating oil is volatilized into oil gas and escapes to the outside along a shaft gap to be condensed into suspended oil mist when meeting air; the exciter cooling mode is external forced air cooling, air is fed into air inlets on two sides of an exciter shell, heat generated by an exciter unit is discharged through a fan on the top of the shell, negative pressure is formed in the exciter cover relative to external air pressure, and floating dust and oil mist are inevitably sucked into the exciter unit and form oil stain attachments because gaps among the air inlets, the exciter cover and a large shaft are located in an oil mist distribution area, so that electrical insulation is reduced finally; in addition, the maintenance personnel adopt the charged cleaning agent during the shutdown maintenance, and after the cleaning agent is mixed with the oil stain, the cleaning agent enters the deep part of the electric component along the gap under the action of the pressure nozzle, so that the insulation degree of the deep part of the electric component is reduced, and as a result, the cleaning effect is poorer and poorer.
Disclosure of Invention
The invention aims to thoroughly solve the problem that the insulation degree of an exciter unit is reduced due to oil contamination to report faults, and provides a sintering waste heat power generation exciter and a method for preventing oil contamination infection.
The specific scheme of the invention is as follows: the utility model provides a take precautions against sintering waste heat power generation exciter that greasy dirt infects, includes the bearing frame, is equipped with the main shaft in the bearing frame, and generating set is connected to main shaft one end, and the excitation unit is connected to the other end, and the excitation unit is equipped with the shell, and the top of shell is equipped with an air-supply line, and the shell side is equipped with the air outlet, is equipped with cooling fan in the air-supply line, and the cooling fan during operation is the malleation environment in making the shell to the interior blast air of shell.
The height from the air inlet of the air inlet pipe to the top of the shell is more than 300mm, and the cooling fan is arranged on the top of the air inlet pipe.
The invention also provides a method for preventing oil contamination infection, and particularly relates to a method for cleaning the excitation unit by using a dry brush after the shell is opened during shutdown maintenance, and then collecting dust of the excitation unit by using a dust collector.
After the generator is stopped, the running time of the cooling fan of the exciter is kept to be more than or equal to 15 minutes, and the cleaning work is carried out after the external oil mist is completely settled.
The working principle of the invention is as follows: the rotation direction of the cooling fan of the excitation cover is changed, air exhaust is changed into air blast into the excitation unit shell, the original air inlet is changed into an air outlet, positive pressure is formed in the shell relative to the external air pressure, and oil mist is prevented from being sucked in from gaps among the air door, the excitation cover and the large shaft; the air inlet pipe is heightened, the air inlet is lifted to exceed 300mm of the outer shell, so that the air inlet is separated from an oil mist distribution area, and oil mist is prevented from being sucked from the air inlet.
The invention has the following beneficial effects: 1. the condition that oil stains infect the excitation unit is fundamentally avoided, and the damage caused by the reduction of electrical insulation is avoided; 2. the failure outage rate of equipment is reduced, and the recovery efficiency of secondary energy of the generator is effectively improved; 3. the deep maintenance period is prolonged, and the maintenance cost is saved.
Drawings
FIG. 1 is a schematic diagram of the exciter assembly configuration of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a schematic diagram of a prior art exciter assembly;
in the figure: 1-a generator set, 2-a main shaft, 3-a bearing seat, 4-a shell, 5-an air outlet, 6-an air inlet pipe, 7-a cooling fan and 8-an oil mist distribution area.
Detailed Description
Referring to fig. 1-2, the sintering waste heat power generation exciter for preventing oil contamination infection in the embodiment includes a bearing block 3, a main shaft 2 is installed in the bearing block 3, one end of the main shaft 2 is connected with a generator set 1, the other end of the main shaft is connected with an exciter set, the exciter set is provided with a housing 4, the top of the housing 4 is provided with an air inlet pipe 6, the side surface of the housing 4 is provided with an air outlet 5, a cooling fan 7 is installed in the air inlet pipe 6, and when the cooling fan 7 works, air is blown into the housing 4 to enable the interior of the housing 4 to be in a positive pressure environment.
In this embodiment, the height from the air inlet of the air inlet pipe 6 to the top of the housing 4 is 500mm (according to the actual situation, the height is larger than 300mm, so that the air inlet is higher than the oil mist distribution area 8), and the cooling fan 7 is installed on the top of the air inlet pipe 6.
In the embodiment, when the generator is shut down for maintenance, the cooling fan 7 is kept running for 20 minutes after the generator is shut down, and power failure cleaning work is performed after external oil mist is completely settled; during cleaning, liquid such as an electrified cleaning agent is prevented from being used for cleaning, and the cleaning agent is prevented from extending into the electrical component; firstly, a dry brush is adopted to clean the attached dust, and then a dust collector is used to collect the dust.
Claims (4)
1. The utility model provides a take precautions against sintering waste heat power generation exciter that greasy dirt infects, includes the bearing frame, is equipped with the main shaft in the bearing frame, and generating set is connected to main shaft one end, and excitation unit is connected to the other end, and excitation unit is equipped with shell, characterized by: the top of the shell is provided with an air inlet pipe, the side face of the shell is provided with an air outlet, a cooling fan is arranged in the air inlet pipe, and when the cooling fan works, air is blown into the shell to enable the interior of the shell to be in a positive pressure environment.
2. The exciter of claim 1, which is used for preventing oil pollution infection and used for generating electricity by using waste heat from sintering, and is characterized in that: the height from the air inlet of the air inlet pipe to the top of the shell is larger than 300mm, and the cooling fan is installed at the top of the air inlet pipe.
3. The method for preventing the oil contamination of the sintering waste heat power generation exciter according to claim 1, which is characterized in that: when the machine is stopped for maintenance, the shell is opened and then cleaned by a dry brush, and then dust of the excitation unit is collected by a dust extraction device.
4. A method according to claim 3 for combating oil contamination infestation, which method comprises: and after the generator is stopped, keeping the running time of the cooling fan of the exciter to be more than or equal to 15 minutes, and performing power failure cleaning work after external oil mist is completely settled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110867701.5A CN113472141A (en) | 2021-07-30 | 2021-07-30 | Sintering waste heat power generation exciter and method for preventing oil contamination infection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110867701.5A CN113472141A (en) | 2021-07-30 | 2021-07-30 | Sintering waste heat power generation exciter and method for preventing oil contamination infection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113472141A true CN113472141A (en) | 2021-10-01 |
Family
ID=77883327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110867701.5A Pending CN113472141A (en) | 2021-07-30 | 2021-07-30 | Sintering waste heat power generation exciter and method for preventing oil contamination infection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113472141A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113716Y (en) * | 2007-10-08 | 2008-09-10 | 南阳防爆集团有限公司 | Large-capacity synchronizing generator brushless exciter |
| CN204216737U (en) * | 2014-10-29 | 2015-03-18 | 哈尔滨胜达电机密封设备有限公司 | A kind of collector ring of generator cooling air duct system |
| CN108023451A (en) * | 2017-12-14 | 2018-05-11 | 卧龙电气集团股份有限公司 | A kind of positive-pressure explosion-proof generator |
| CN110535290A (en) * | 2019-09-26 | 2019-12-03 | 苏州保邦电气有限公司 | The super high speed motor air-cooled circulatory system in parallel |
| CN111030359A (en) * | 2019-12-16 | 2020-04-17 | 张运球 | Wind pressure self-increasing motor heat dissipation device based on Bernoulli principle |
| CN111817522A (en) * | 2020-06-29 | 2020-10-23 | 山东齐鲁电机制造有限公司 | Three-machine coaxial excitation structure |
-
2021
- 2021-07-30 CN CN202110867701.5A patent/CN113472141A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113716Y (en) * | 2007-10-08 | 2008-09-10 | 南阳防爆集团有限公司 | Large-capacity synchronizing generator brushless exciter |
| CN204216737U (en) * | 2014-10-29 | 2015-03-18 | 哈尔滨胜达电机密封设备有限公司 | A kind of collector ring of generator cooling air duct system |
| CN108023451A (en) * | 2017-12-14 | 2018-05-11 | 卧龙电气集团股份有限公司 | A kind of positive-pressure explosion-proof generator |
| CN110535290A (en) * | 2019-09-26 | 2019-12-03 | 苏州保邦电气有限公司 | The super high speed motor air-cooled circulatory system in parallel |
| CN111030359A (en) * | 2019-12-16 | 2020-04-17 | 张运球 | Wind pressure self-increasing motor heat dissipation device based on Bernoulli principle |
| CN111817522A (en) * | 2020-06-29 | 2020-10-23 | 山东齐鲁电机制造有限公司 | Three-machine coaxial excitation structure |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211001 |